A floating island of debris broader than Texas has been crossing the Pacific Ocean toward the U.S. west coast since a devastating tsunami hit Japan in March 2011, killing nearly 16,000 people.

Five million tons of wreckage — including everything from boats and building rubble to appliances and consumer products — could wash up on shores in Hawaii, Alaska, the U.S. West Coast and Canada over the next few years, an updated report by the National Oceanic and Atmospheric Association (NOAA) revealed.